This paper proposes
new realizations of low-frequency quadrature sinusoidal oscillators using CDBA
(current differencing buffered amplifier) as the active building block (ABB).
The proposed circuits employ reduced number of components, namely two CDBAs,
four (or five) resistors and two true/virtually grounded capacitors. The
oscillators provide two quadrature voltage outputs and the condition of
oscillation (CO) and the frequency of oscillation (FO) are independently
controllable. Low frequency generation is enabled by the presence of difference
term in the numerator of FO. The non-ideal analysis and sensitivity study of
the circuits have been carried out and the circuits exhibit satisfactory
sensitivity performance. SPICE simulation results are included that validate
the working of the circuit.